Bug: TSC2 Help Desk CTab ActiveX Control Buffer Overflow ( Ascii Version )

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TSC2 Help Desk CTab ActiveX Control Buffer Overflow

Published
Credit
Risk
2009.01.08
Secunia Research
High
CWE
CVE
Local
Remote
CWE-119
CVE-2008-4827
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
9.3/10
10/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete

======================================================================

Secunia Research 07/01/2009

- TSC2 Help Desk CTab ActiveX Control Buffer Overflow -

======================================================================
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

======================================================================
1) Affected Software

* TSC2 Help Desk 4.1.8

NOTE: Other versions may also be affected.

======================================================================
2) Severity

Rating: Highly critical
Impact: System compromise
Where: Remote

======================================================================
3) Vendor's Description of Software

"TSC2 Help Desk from is full-featured, easy to use help desk software
that will help you manage your support issues and assets.".

Product Link:
http://www.tsc2-helpdesk.com/

======================================================================
4) Description of Vulnerability

Secunia Research has discovered a vulnerability in TSC2 Help Desk,
which can be exploited by malicious people to potentially compromise
a user's system.

The vulnerability is caused due to a boundary error in the included
CTab ActiveX control (c1sizer.ocx) when copying tab captions. This
can be exploited to cause a heap-based buffer overflow by e.g. adding
multiple tabs via the "AddTab()" method.

Successful exploitation may allow execution of arbitrary code.

======================================================================
5) Solution

Set the kill-bit for the affected ActiveX control.

======================================================================
6) Time Table

13/11/2008 - Vendor notified.
07/01/2009 - Public disclosure.

======================================================================
7) Credits

Discovered by Carsten Eiram, Secunia Research.

======================================================================
8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2008-4827 for the vulnerability.

======================================================================
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

======================================================================
10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-54/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================

References:

http://xforce.iss.net/xforce/xfdb/47771
http://xforce.iss.net/xforce/xfdb/47770
http://xforce.iss.net/xforce/xfdb/47769
http://www.securityfocus.com/bid/33148
http://www.securityfocus.com/archive/1/archive/1/499830/100/0/threaded
http://securitytracker.com/id?1021529
http://secunia.com/secunia_research/2008-54/
http://secunia.com/secunia_research/2008-53/
http://secunia.com/secunia_research/2008-52/
http://secunia.com/advisories/32672
http://secunia.com/advisories/32648
http://secunia.com/advisories/32609

See this note in TXT Version

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Ascii Version